head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Execution · Grand Arena
A weapons-based 3D fighter where Reversal Edge decisions and ring positioning create constant human reads.

Execution · Grand Arena
A tag-team 3D fighter layering team optimization onto Tekken's execution and reads core.
SoulCalibur VI leans Execution (Grand Arena); Tekken Tag Tournament leans Execution (Grand Arena).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
SoulCalibur VI
Reversal Edge timing and long lethal hit strings require tight execution
Tekken Tag Tournament
Tag combos and netsu juggles demand precise inputs
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
SoulCalibur VI
Reversal Edge is a pure read-off mechanic against human opponents
Tekken Tag Tournament
Tag timing adds another layer of human mind-games
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
SoulCalibur VI
No RNG; ring position is full information
Tekken Tag Tournament
Open information; nothing hidden between rounds
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
SoulCalibur VI
Soul Charge routes and matchup character knowledge reward study
Tekken Tag Tournament
Team synergy and tag combo routing are optimizable systems
A matching score does not mean a matching test. Two games can both sit at 10 on execution and demand completely different things of you - which is why the reasoning above matters more than the number beside it.